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ACPI / watchdog: Fix off-by-one error at resource assignment

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The resource allocation in WDAT watchdog has off-one-by error, it sets
one byte more than the actual end address.  This may eventually lead
to unexpected resource conflicts.

Fixes: 058dfc7670 (ACPI / watchdog: Add support for WDAT hardware watchdog)
Cc: 4.9+ <[email protected]> # 4.9+
Signed-off-by: Takashi Iwai <[email protected]>
Acked-by: Mika Westerberg <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Takashi Iwai 2018-03-19 14:51:49 +01:00 • committed by Rafael J. Wysocki
commit b1abf6fc49
2 changed files with 3 additions and 3 deletions
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2
drivers/watchdog/wdat_wdt.c
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@ -392,7 +392,7 @@ static int wdat_wdt_probe(struct platform_device *pdev)
memset(&r, 0, sizeof(r));
r.start = gas->address;
r.end = r.start + gas->access_width;
r.end = r.start + gas->access_width - 1;
if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
r.flags = IORESOURCE_MEM;
} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {